Tree frog, Costa Rica

Let's be honest, frogs don't always get the attention they deserve.

These little jumpers have been around since dinosaurs roamed the Earth, and they've evolved into some of the weirdest, coolest creatures out there.

With over 4,000 known species worldwide, they come in all shapes and sizes, from the tiny New Guinea Amau frog—smaller than a dime—to the large Goliath frog, which can weigh more than 3 kilograms.